JPH11194000A - Blocking plug for electric detonator and its manufacture - Google Patents

Abstract

PROBLEM TO BE SOLVED: To assure stable electrical contact with a connector by inserting the tip part of a pair of main lead pins into an insulation header, bringing a base for sealing into contact with the rear surface, melting and coagulating a sealing agent being loaded into the base for sealing, and then joining the main lead pins to auxiliary lead pins. SOLUTION: A thick collar 212 of a main lead pin 210 out of a pair of lead pins 21 and 22 is accommodated into a through hole 11 of an insulation header 1. At the same time the other main lead pin 220 is inserted into a lead pin insertion hole 121 at the bottom part of a closed-end hole 12, a tin collar 222 is accommodated in the closed-end hole 12, the main lead pins 210 and 220 are passed through holes 321 and 322 of a base 3 for sealing, and the base 3 for sealing is placed on the insulation header 1. Then, the thick collar 210 and the insulation header 1 are pressed by a bottom wall 32 of the base 3 for sealing, the main lead pins 210 and 220 are supported vertically, and the base 3 for sealing is sealed by melting and coagulating a sealing agent 4 in this state. Further, auxiliary lead pins 211 and 221 that have already been subjected to corrosion-resistant treatment are joined to the main lead pins 210 and 220.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric detonator embolic and a method for manufacturing the same.

[0002]

2. Description of the Related Art Electric detonators and concrete used for blasting operations
As a plug for an electric detonator used for a crusher and an electric detonator used for an airbag for automobiles, as shown in FIG.
2 ′, the sealing header 3 ′ is brought into contact with the back surface of the insulating header −1 ′, the sealing agent 4 ′ is put in the sealing base 3 ′, and the glass sealing agent is melted by firing. An electric detonator incorporating such an embolus is known to perform sealing by coagulation. As shown in FIG. 10 (b), an electric detonation wire is provided between the distal ends of lead pins 21 'and 22' of the embolus. 51 '
The plug is attached to a metal outer cylinder 53 'containing an ignition agent 52', and the rear ends of the lead pins 21 'and 22' are inserted and connected to a connector of a detection circuit, and the operation of the detection circuit is performed. The ignition charge 52 'is ignited by the energized heat generated by the electric wire 51', and the metal outer cylinder 53 'is ruptured.

[0003]

In the electric detonator described above, it is required that the lead pins be subjected to anticorrosion treatment such as gold plating in order to secure stable electrical contact between the lead pins and the connector. . If the lead pins are preliminarily plated with gold, the gold plating layer is liable to be damaged by baking at the time of the above sealing. On the other hand, if gold plating is performed after the sealing, even the sealing die is plated. As a result, the high cost of gold necessitates higher costs.

An object of the present invention is to seal a base with a lead pin by melting and solidifying the sealant by baking the sealant into a sealing base, and connecting the rear end of the lead pin to a connector. Provide an electric detonator plug that can be manufactured at low cost while ensuring good corrosion protection of the anticorrosion plating, and a method for manufacturing the same. Is to do.

[0005]

According to a first aspect of the present invention, there is provided an electric detonator embolus in which the distal ends of a pair of main lead pins are inserted into an insulating header, and a sealing base is provided on the back of the insulating header. The sealant which is brought into contact with the base and melted and solidified is sealed and sealed, and the anticorrosion-treated auxiliary leadpin is joined to the main leadpin. In addition, a large diameter portion can be provided at the tip of the auxiliary lead pin.

In another plug for an electric detonator according to the present invention, the tip of at least one main lead pin is inserted into a sealing die, and the sealing agent put in the sealing die is melted. An auxiliary lead pin which has been solidified and sealed and which has been subjected to anticorrosion treatment is joined to the main lead pin.

The method for producing an electric detonator embolus according to the present invention is characterized in that an anticorrosion-treated auxiliary lead pin is joined to a main lead pin after firing a sealant put in a sealing die. The configuration is as follows.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an example of an electric detonator embolus according to the present invention. In FIG. 1, reference numeral 1 denotes a plate-shaped insulating header, which is made of a sealing agent described later, for example, a heat-resistant insulating material capable of thermally withstanding firing and solidification of glass, and is preferably made of ceramics such as alumina. Reference numeral 21 (22) denotes a lead pin (usually a circular cross section, but it may be a triangular or quadrangular polygon), and a main lead pin 210 (220) and an auxiliary lead which has been subjected to anticorrosion treatment. It is configured by joining with the doping pin 211 (221), for example, by welding. Of these lead pins, the leading end of the main lead pin 210 of one of the lead pins 21 is formed into a thick flange 212 having a thickness substantially equal to the thickness of the insulating header-1, and the other lead pin 22 is formed. The tip of the main lead pin 220 is formed into a thin flange 222 (thickness is about 20 to 80% of the thickness of the thick flange) thinner than the thick flange 212. For the anticorrosion treatment (shown by a) of the auxiliary lead pin 211 (221), gold plating, platinum plating, nickel plating or the like can be used. For this lead pin, in particular, the main lead pin, a metal which is excellent in adhesiveness to a sealant described later and which is easily welded to an electric bridge wire is used. For example, when the sealant is glass, Fe- Ni alloy (Fe-50Ni, Fe
-42Ni) is preferred.

The insulating header-1 is provided with a through hole 11 for receiving the thick flange 212 and a bottomed hole 12 for receiving the thin flange 222, and the bottom of the bottomed hole 12 has the other end. A lead pin insertion hole 121 into which the lead pin 22 is inserted in a substantially close state is provided.

Reference numeral 3 denotes a sealing base, which is a side wall 31 and a bottom wall 32.
The bottom wall 32 has a pin insertion hole 321 into which one main lead pin 210 is inserted in a substantially close state and a pin insertion hole having a hole diameter larger than the outer diameter of the other main lead pin 220. 322 is drilled. The sealing base 3 is made of a metal having sufficient rigidity, for example, stainless steel is preferable. Reference numeral 4 denotes a sealing agent for sealing the inside of the sealing base 3, and glass, particularly lead glass, is suitable.

In order to manufacture the above-mentioned plug for an electric detonator by the method according to the fourth aspect of the present invention, as shown in FIG. 2A, the thickness of the bottom wall 32 of the sealing base 3 and one of the main lead pins 210 are increased. The meat collar 212 is previously joined by welding or the like. In FIG. 2A, the other main lead pin 220 is inserted into the bottom hole 121 of the perforated bottom 12 of the perforated bottom 12 of the insulating header 1 and a thin flange 222 of the main lead pin 220 is provided. The insulating header-1 is placed horizontally on the work board 5 in a state of being accommodated in the bottom hole 12, and the sealing base 3 to which the main lead pin 210 is joined is placed on the insulating header-1. Insulated header
The main lead pin 21 accommodates the thick flange 212 in the through hole 11 and presses the insulating header 1 with the sealing base 3.
0,220 is supported vertically. Next, a sealing agent 4, for example, a glass paste (a mixture of glass powder and an organic solvent) is put into the sealing die 3, and the temperature is higher than the melting temperature of glass (400 ° C. to 600 ° C. in the case of lead glass). After baking at a temperature, the sealing agent 4 is melted and solidified to complete the sealing.

In the above embodiment, the thick flange 212 of the main lead pin 210 and the bottom wall 32 of the sealing base 3 are electrically connected by welding or the like. Can be contacted to ensure electrical continuity. In this case, it is necessary to change the above manufacturing process, and FIG.
In (a), the thick flange 212 of one main lead pin 210 is housed in the through hole 11 of the insulating header-1, and the other main lead pin 220 is inserted into the bottom hole 12 at the bottom of the lead pin insertion hole 121. The insulating header-1 is horizontally placed and supported on the work panel 5 in a state where the thin flange 222 is inserted into the bottomed hole 12 by inserting the thin flange 222 into the bottomed hole 12. The sealing base 3 is placed on the insulating header 1 through the lead pins 210 and 220, and the bottom wall 32 of the sealing base 3 presses the thick flange 212 and the insulating header 1, and the main lead pins 210 and 220. 220 is vertically supported, and the sealing base 3 is sealed in this state.

In any of the above cases, the main lead pins 210 are sealed as shown in FIG.
(220) Corrosion-resistant auxiliary lead pins 2 at the rear end
11 (221) by welding or the like (in this welding,
Arc welding, resistance welding, etc., which can be welded in about several milliseconds, are suitable), and the production of the electric detonator embolus according to the present invention is completed.

FIG. 3 shows another example of an electric detonator embolus according to the first aspect of the present invention. In FIG. 3, reference numeral 1 denotes an insulating header, for example, a ceramic header. 21 (22)
Is the main lead pin 210 (220) and the anticorrosion treatment auxiliary lead pin 211 (221) (the anticorrosion treatment layer is indicated by a).
And a leading pin of one of the main lead pins 210 is provided with an insulating header.
A thick flange 212 having a thickness equal to 1 is provided, and the insulating header-1 is provided with a thick flange receiving hole 11. Also,
Near the tip of the other main lead pin 220, a collar 2220 is provided.
And the main lead pin 22 is provided on the insulating header-1.
In addition, an insertion hole 120 for inserting the front end of the insertion header 120 is provided, and a protruding portion 13 protruding around the insertion hole 120 is provided on the back surface side of the insulating header-1.

Reference numeral 3 denotes a sealing base, which is formed of a side wall 31 and a bottom wall 3.
And the bottom wall 32 has a protrusion 13 of the insulating header-1.
(The height of the protrusion 13 is larger than the thickness of the bottom wall 32.)
322 and one of the main lead pins 21
A hole 321 for inserting 0 is formed. Reference numeral 4 denotes a sealing agent, for example, glass, which is melted and solidified in the sealing die 3.

In welding the main lead pin 210 (220) and the auxiliary lead pin 211 (221), a large-diameter portion is provided at the tip of the auxiliary lead pin 211 (221), and the end face of the large-diameter portion is formed. Can be welded. In this case, the radius of the end surface of the large-diameter portion is R, the radius of the main lead pin 210 (220) is r, and the distance between the lead pins (the distance between the auxiliary lead pins) can be adjusted ± 2 (R−r). Can be considerably increased by increasing R.

In order to manufacture the above-mentioned electric detonator embolus by the method according to the fourth aspect of the present invention, as shown in FIG. 4A, the insulating header-1 is horizontally placed and supported on the work board 5, and The thick flange 212 of the main lead pin 210 is inserted into the through hole 11 of the insulating header-1. Also, the other main lead pin 22
0 through the insertion hole 120 of the insulating header-1,
The flange 2220 is supported on the front end plane of the protrusion 13 of the insulating header-1. Next, each of the holes 321 and 3 of the sealing die 3
The sealing base 3 is brought into contact with the insulating header 1 through the main lead pins 210 and 220 to make the protrusion 13 of the insulating header 1 protrude from the bottom wall 32 of the sealing base 3. Of the main lead pin 210 is held down by the bottom wall 32 of the sealing base 3, and in this state, the sealing base 3 is closed.
The sealing agent 4, for example, glass paste, is put in the inside, and the whole is baked at a temperature equal to or higher than the melting temperature of the sealing agent.
Solidifies to complete the seal. After this sealing, as shown in FIG. 4B, the auxiliary lead pin 211 (221) which has been subjected to anticorrosion treatment is replaced with the main lead pin 210 (220).
To complete the production of the electric detonator embolus.

FIGS. 5 and 6 show an electric detonator incorporating the respective electric detonator embolus according to the present invention, in which an electric bridge 51 is connected between the lead pins 21 and 22 of the electric detonator embolus. This plug is inserted into the metal outer cylinder 53 containing the ignition agent 52, and the edge of the sealing base 3 and the edge of the outer cylinder 53 are welded and sealed, so that each main lead pin 210 ( 22
Auxiliary lead pin 211 for corrosion protection plating welded to 0)
(221) is inserted and connected to the connector of the detection circuit for use. The contact resistance at the insertion contact interface in this connector is extremely stable because of the anticorrosion treatment of the auxiliary lead pins 211 and 221. Further, even if the pin hole interval of the connector is slightly different, the above-mentioned auxiliary lead pin 21 may be used.
It can be dealt with by adjusting the intervals of 1,221.

5 and 6, both the lead pins 21 and 22 are electrically connected to each other by a bridge 51, so that the outer cylinder 53 and the base 3 are welded and the base 3 and one end of the lead pin. Since the metal outer cylinder 53 and the lead pin 221 are electrically connected to each other by electrical contact with the portion 212,
It is possible to prevent the occurrence of an excessive induced potential difference between the dopins 21 and 22 and the metal outer cylinder 53, to eliminate the explosion of the electric detonator due to the discharge when the excessive potential difference occurs, Since the gap between the bottom wall 32 of the sealing base 3 and the bottom surface 32 is separated by a sufficient creepage distance b, a current can flow through the electric bridge 51 without leakage of current to the sealing base 3 during operation. Excellent operation reliability or reliability is ensured by the fact that the ignition of the igniter 52 by the Joule heat of the bridge 51 can be reliably performed, and the contact resistance of the plug contact interface in the connector is stable. Quality can be guaranteed.

FIG. 7 shows an example of an electric detonator embolus according to the second aspect of the present invention. One of the lead pins 21 is composed of a main lead pin 210 and an anticorrosion treatment auxiliary lead pin 211. The tip of the main lead pin 210 of the doping pin 21 is inserted into the thick sealing base 3, and the sealing agent 4 put in the sealing base 3 is melted and solidified to perform sealing. The anticorrosion-treated auxiliary lead pin 211 is joined to the main lead pin 210 by welding or the like, and the other anticorrosion-treated lead pin 22 is joined to the end face of the thick sealing base 3 by welding or the like. ing.

In order to manufacture the electric detonator embolus, FIG.
As shown in (a), the sealing die 3 is placed on the end plate 6 and the main lead pins 210 are vertically supported, and the sealing agent 4 such as glass paste is put into the sealing die 3. Then, the sealing agent is melted and solidified, the end plate is removed as shown in FIG. 8 (b), and the front surface is further ground to seal the main lead pin end surface 210e as shown in FIG. 8 (c). The stopper end face 4e and the sealing base end face 3e are flush with each other. Thereafter, as shown in FIG. 7, the auxiliary lead pin 211 which has been subjected to anticorrosion treatment is joined to the main lead pin 210 by welding or the like. Then, the other lead pin 22 which has been subjected to anticorrosion treatment is joined to the rear end face of the sealing base 3 by welding or the like, thereby completing the production of the electric detonator plug shown in FIG.

FIG. 9 shows an electric detonator incorporating the electric detonator embolus according to the present invention shown in FIG. 7, wherein the front end face of one of the lead pins 21 and the front end face of the sealing cap 3 of the electric detonator embolus. And an electric bridge 51 connected between the
In this configuration, the edge of the sealing base 3 and the edge of the outer cylinder 53 are welded and sealed, and a lead pin is inserted into and connected to a connector of the detection circuit. To use.

Also in this electric detonator, the outer cylinder 53 and the other lead pin 22 are electrically connected to each other via the sealing base 3, and one of the lead pins 21 is connected to the outer cylinder 53 by the electric wire 51.
Is electrically conducted through the sealing base 3 to prevent occurrence of an excessive induced potential difference between the two lead pins 21 and 22 and the metal outer cylinder 53.
On the other hand, even if the sealing base 3 is inserted in series, the sealing base 3 is thick and has extremely low resistance, so that a sufficient current can be supplied to the bridge 51 during operation, and As a result, the ignition of the igniter 52 by the Joule heat can be reliably performed, and the stability of the contact resistance at the insertion contact interface in the connector described above is combined with the excellent operation reliability or reliability. Can be guaranteed.

[0024]

According to the embolus for an electric detonator according to the present invention, the lead pin is provided with the main lead pin and the auxiliary lead which is subjected to anticorrosion treatment.
Since the main lead pin and the sealing die are sealed by melting and solidifying the sealant, the lead pin material is used to improve the adhesion between the lead pin and the sealant. By using an excellent one, it is possible to guarantee a stable encapsulation.
Stable electrical contact with the motor.

Further, according to the method for producing an electric detonator plug according to the present invention, the lead pin connector can be formed despite the fact that the sealing inside the sealing cap is performed by melting and solidifying the sealing agent by firing. -It is possible to easily manufacture an electric detonator embolus having a good corrosion-resistant plating such as gold plating on the insertion portion. That is, damage to the anticorrosion plating due to firing can be eliminated, and waste of expensive plating materials such as gold caused by extra plating in the case of post plating can be eliminated, so that the rear end of the lead pin is electrically connected to the connector. A plug for electric detonation, which is plated with anticorrosion for connection with stable contact resistance, can be manufactured at low cost while guaranteeing the anticorrosion properties of anticorrosion plating.

Further, there is an advantage that an electric detonator plug can be manufactured which can cope with a slight difference in the pin insertion hole of the connector by adjusting the interval between the auxiliary lead pins.

[Brief description of the drawings]

FIG. 1 is a drawing showing an example of an electric detonator embolus according to claim 1;

FIG. 2 is a view showing a method of manufacturing the electric detonator embolic of FIG. 1;

FIG. 3 is a view showing another example of the electric detonator embolus according to claim 1;

FIG. 4 is a view showing a method of manufacturing the electric detonator embolic of FIG. 3;

FIG. 5 is a view showing a use state of the electric detonator embolic of FIG. 1;

FIG. 6 is a view showing a use state of the electric detonator embolic of FIG. 3;

FIG. 7 is a drawing showing an example of an electric detonator embolus according to claim 2;

FIG. 8 is a view illustrating a method of manufacturing the electric detonator embolus of FIG. 7;

FIG. 9 is a view showing a use state of the electric detonator embolic of FIG. 7;

FIG. 10 is a view showing a conventional electric detonator embolus and an electric detonator.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Insulating header 21 Lead pin 22 Lead pin 210 Main lead pin 220 Main lead pin 211 Auxiliary lead pin 221 Auxiliary lead pin a Anticorrosion treatment layer 3 Sealing base 4 Sealant

Claims (4)

[Claims] 1. A tip of a pair of main lead pins is inserted through an insulating header, a sealing die is brought into contact with the back of the insulating header, and the sealing agent put in the die is melted. A plug for an electric detonator characterized in that an auxiliary lead pin which has been solidified and sealed and which has been subjected to anticorrosion treatment is joined to a main lead pin. 2. A tip of at least one main lead pin is inserted into a sealing die, and a sealing agent put in the sealing die is melted and solidified to perform sealing. An embolus for an electric detonator, characterized in that an anticorrosion-treated auxiliary lead pin is joined to a main lead pin. 3. The electric detonator embolus according to claim 1, wherein a large diameter portion is provided at a tip of the auxiliary lead pin. 4. A method for manufacturing an electric detonator embolus according to claim 1, wherein the auxiliary lead pin having been subjected to anticorrosion treatment is fired after firing of a sealing agent put in a sealing die. A method for producing an electric detonator embolus, characterized in that the embolus is joined to a priming.